【摘要】 由于自锚式悬索桥的主缆是锚固在加劲梁上的,采用钢筋砼或预应力砼构件的自锚式悬索桥,加劲梁和桥塔的收缩、徐变必然引起主缆和吊索的内力变化,从而导致结构内力和支点反力的重分布以及结构线形的变化,在结构设计时必须考虑砼收缩徐变的影响.采用初应变法推导出考虑砼加荷龄期的结构收缩徐变效应分析的有限元表达式,用FORTRAN语言编写了计算机程序,并以广东佛山平胜大桥为例,进行结构成桥后的收缩徐变效应分析,研究砼收缩徐变效应对自锚式悬索桥结构的影响.更多还原

【Abstract】 Because the self-anchored suspension bridge adopts reinforced concrete or prestressed concrete members and its cables are anchored on the stiffening girder,the shrinkage and creep of stiffening girder and bridge tower will induce the changes of internal forces of cables and hangers,which results in the redistribution of action effects and reactions and the transformation of structure state.So the influence of concrete shrinkage and creep must be taken into account in the design of structure.The initial strain method was adopted to deduce the finite element expression of shrinkage and creep effects on the structure while taking the age of loading into account,and a programme was compiled by FORTRAN.Taking Pingsheng Bridge of Guangdong as an examples,the analysis of shrinkage and creep on self-anchored suspension bridge was carried on after bridge finished.更多还原